rl. 
MUSCOVY 
DeEscRIPTION. 
DU PCiKt 
lodious, and the bird obferved fometimes to perch on trees, in the 
manner of the hifling Duck: the native name is Newal Gang, 
Anas mofchata, Ind. Ora. ii. p. 846. 37- 
—— indica, Ger. Orn. v. t. 568. 569. 
Mufcovy Duck, Gen. Syz. vi. p. 476. 31.—Lin Tran. iv. p. 13. pl. xvi. fi 
Ga1Gre 
HE male of this differs in the formation of the trachea from the 
female, as in feveral of the Duck genus: the windpipe is ftout, 
nearly equal in diameter, but a trifle fmaller towards the bottom; the 
bony arch, as in others, finifhes the bottom part, and appears as if 
furnifhed with rings, but they are not moveable as in the reft of the 
trachea: the orbicular labyrinth is attached to the fide of it: this is 
not fmooth on the furface, as in the Pimtail and Wigeon, but univerfal- 
ly rough and irregularly furrowed with fine indented lines ; the oppo 
fite fide runs into a pear-ihape, and is placed obliquely, with the point 
loweft, but is flatted confiderably on the furface: the bony arch is on 
this fide fmooth, having no appearance of rings, and is bent at a 
fmall angle from the trachea, although it conftitutes a continuance of 
it. In old birds, the bony labyrinth is more rounded, and larger, 
but ftills retains the roughnefs on the furface; in a very old bird, 
furnifhed to me by Mr. Boys, the labyrinth is not only much larger, 
but nearly globular, and the bony arch quite fmooth, yet is finely 
granulated and faintly wrinkled, and the texture more bony. That 
figured by Dr. Block, in the Berlin Tranfattions, appears by much tco 
large, but it is not for us to fay that it is faulty, for in cafe his figure 
is taken from a foreign fpecimen, and fuppofing that the Mu/covy 
Duck arrives at twice the fize we fee them in England, and which they 
are faid to do, no doubt but the labyrinth and its trachea would bear 
a due proportion. 
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Se 
